Lotz and Kier
1928 Jorgen Lotz and Olaf Kier, formed Lotz and Kier, a construction business[1]. They were pioneers of reinforced concrete design and construction. Their first contract was for to use reinforce concrete in a bridge in Bath (which is still in service in 2021 and bears the Lotz and Kier plaque - presumably this was Cleveland Bridge).
1932 J. L. Kier and Co was formed to take over the civil engineering and building contractor business that had been established by Olaf Kier.